John Chapin may refer to:
John B. Chapin (1829–1918), American physician and mental hospital administrator John L. Chapin (1913–1944), United States Army captain John Putnam Chapin (1810–1864), mayor of Chicago, Illinois John R. Chapin (1827–1907), American artist and illustrator
See also Captain John L. Chapin High School, El Paso, Texas, United States